Low- and high-frequency binaural brainstem pathways prefer opposite interaural phase ranges

Evidence

Evoked responses to the intermediate IPM rate (6.8 Hz; Fig. 2 ) became steady state at the same rate as the IPM, and so we term this response the IPM-FR. … Responses obtained at 6.8 Hz IPM rate were maximal for IPDs spanning ±45–±90°, whereas responses obtained at 13.4 Hz IPM rate increased monotonically with increasing IPD. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2949 (#expands, via linked claim)

The model assumes devices or channels that are tuned to particular interaural delays. These devices, which exist only for frequencies below 1500 Hz, are assumed to be arrays of channels each tuned to a different characteristic interaural delay. Each channel then acts as an interaural delay filter. It transmits whatever signal arrives at its characteristic delay without attenuation, but attenuates more and more those signals that arrive with delays that are increasingly different from the characteristic delay of the channel. — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1680 (#qualifies, via linked claim)

Categorization

• XREF: connects to: MSO and LSO neurons have opposite optimal interaural phase responses — Dijk, Pim van, Physiology, Psychoacoustics and…, 2947; High-frequency interaural phase differences are ambiguous about azimuth location; The best interaural phase deviation for evoking neural responses depends on modulation rate — Dijk, Pim van, Physiology, Psychoacoustics and…, 2949 (+3 more)

Related

• Slow interaural-phase modulation evokes transient P1-N1-P2 waves while faster rates produce steadier following responses (similarity 0.89)
• The best interaural phase deviation for evoking neural responses depends on modulation rate (similarity 0.89)
• Abrupt interaural phase changes evoke P1-N1-P2 cortical responses (similarity 0.88)
• MSO and LSO neurons have opposite optimal interaural phase responses (similarity 0.85)
• Optimal interaural phase difference for cortical following responses depends on the IPM rate (similarity 0.83)
• Slow IPD transitions evoke a classic P1-N1-P2 auditory evoked response in the EEG (similarity 0.83)
• Interaural-delay-tuned channels exist only for frequencies below 1500 Hz (similarity 0.83)
• Neural ITD encoding follows distinct temporal-fine-structure vs envelope mechanisms at low vs high frequencies. (similarity 0.81)
• Slow IPM sweeps evoke transient P1-N1-P2 responses while faster rates evoke steady-state following responses. (similarity 0.80)
• Steady-state interaural phase following responses were more robust than responses to slow sweeps. (similarity 0.80)
• Only harmonics separated by more than the ear’s critical bandwidth are resolved (similarity 0.79)
• The brain modulates spatial-hearing responses into a steady-state following response to periodic IPD switches (similarity 0.79)
• Phase transitions hidden at envelope minima decrease monaural detection of interaural cues (similarity 0.78)
• The ear resolves low-frequency direction by measuring phase shift (similarity 0.78)

Broader Connections

• High-frequency interaural phase differences are ambiguous about azimuth location #complicates (0.82)
• The best interaural phase deviation for evoking neural responses depends on modulation rate #expands (0.78) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2949
• Interaural-delay-tuned channels exist only for frequencies below 1500 Hz #qualifies (0.75) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1680
• Abrupt interaural phase changes evoke P1-N1-P2 cortical responses #qualifies (0.72) — Dijk, Pim van, Physiology, Psychoacoustics and…, 2964